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报道了一种采用同轴静电纺丝法制备的表面增强Raman散射(SERS)活性衬底,用于微量环境污染物的快速检测。采用醋酸纤维素(CA)/丙酮-二甲基乙酰胺溶液作为前驱液分散银纳米立方体,利用丙酮促进银颗粒适度团聚,采用同轴静电纺丝法制备了大面积银立方体/CA纳米纤维。由于团聚态银纳米立方体之间的等离子体耦合作用,复合薄膜具有优异的SERS活性,是单分散态的银立方体/CA纳米纤维SERS灵敏度的4倍,实现了0.1nmol/L的对巯基苯胺以及10nmol/L的甲基对硫磷农药的SERS检测,SERS信号强度偏差小于12%。
Abstract：Cellulose acetate(CA) nanofibers were embedded with aggregated silver-nanocubes(AgNCs) by a coaxial electrospinning method. AgNCs were dispersed with CA and acetone-dimethylacetamide(DMAc) as a precursor solution, and Ag NCs aggregation was induced with acetone. The nanofibers have a remarkable surface-enhanced Raman scattering(SERS) activity due to the strong plasmon coupling between neighboring AgNCs, which is 4 times of the monomeric-Ag NC/CA sample. As a result, 0.1 nmol/L p-aminothiophenol(p-ATP) and 10 nmol/L methyl parathion can be identified, respectively. The nanofibers generate large-area homogeneous SERS signals with a relative signal deviation of less than 12% over 1 mm×1 mm area due to the homogeneous adsorption of target molecules. It is thus indicated that aggregated-AgNCs/CA nanofibers have a promising potential in SERS-based detection of organic pollutants in aqueous solutions.
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基本信息:
DOI：10.14062/j.issn.0454-5648.20200476
中图分类号:O657.37;TQ342
引用信息:
[1]柯岩,陈斌,周宁宁,等.负载银纳米立方体的醋酸纤维素纳米纤维及其SERS活性（英文）[J].硅酸盐学报,2021,49(02):220-228.DOI:10.14062/j.issn.0454-5648.20200476.
基金信息:
国家自然科学基金(51632009,91963202,21673245); 中科院前沿科学重点研究计划(QYZDJ-SSW-SLH046);中科院青年创新促进会; 安徽省自然科学基金(1908085QE173)
2020-06-29
2020
2020-09-14
2020
1
2020-10-23
2020-10-23
2020-10-23